#ifndef _SYS_TICK_H_
#define _SYS_TICK_H_

#include "imx6ul.h"

/* 函数声明 */
void sys_delay_init(void);
void delayus(unsigned    int usdelay);
void delayms(unsigned	 int msdelay);
void delay(volatile unsigned int n);
void gpt1_irqhandler(void);


#endif
